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Tutorial: Filtering Routes in OSPF Part 2 » Filtering Between Areas Using area filter-list

In our last article on filtering Routes in OSPF we looked at filtering routes within an OSPF area. In this article we will be filtering routes between areas using the area filter-list command. OSPF route filtering is an important concept to be familiar with for any CCIE candidate. We will be looking at the area filter-list command first. Part 3 will then look at some of the more obtuse ways of filtering using the area range and summary-address commands. Part of being a CCIE is knowing multiple ways of configuring the same task...just in case those evil proctors decide to restrict which of those methods you can and can't do! :)

Featured Posts

Tutorial: OSPF Network Types & Frame-Relay Series

Knowing the OSPF Network Types and how they work with different frame relay topologies is one of those things that you should know inside out if you are attempting the CCIE lab. This five part series of tutorials are designed to take you through all the different OSPF network types and demonstrate how they interact with Frame-Relay over various partial-mesh topologies.

Tutorial: How to use Cisco MQC & NBAR to filter websites like Youtube

Thanks for visiting! If you're new here, you may want to subscribe to my RSS feed. This blog posts regular tutorials, news, and study tips about networking, especially about Cisco CCIE related topics. Go ahead, subscribe to the feed! You can also receive updates from this blog via email. Thanks for visiting!I was asked a [...]

Tutorial: How to set up a basic Dynamips Lab using Dynagen, Part 1

I get a lot of requests from students asking how they can practice some of the topics I teach on my Cisco courses. Cisco equipment can be pretty expensive especially when you are starting out your networking career, and not having anything to practice on makes that barrier to entry that much higher. Enter Dynamips. Dynamips is a Cisco hardware emulator. Its like VMWare for Cisco! It emulates a basic Cisco hardware platform so all you need to add is an IOS.

Latest News

• Antonie Henning, the blogger behind the Last 40 days CCIE blog, has passed his CCIE lab. Great news! Head on over and congratulate him! Well deserved!
• Keith passed! Well deserved. He's built a monster gaming rig and celebrating right now. Head on over to CCIECandidate and congratulate him! "F*&^ this lab! That’s right, right where it hurts. I decided that if the lab exam was a person I was going to do the equivalent of knocking its damned teeth into its face. The lab should be afraid of ME. Punk ass lab." - Keith Tokash Best CCIE Lab study strategy quote ever. :)
• I found this great link from Richard Bannister's CCIE Blog. Richard has put together a great BGP Best Path Selection flow chart that details the order in which a path is chosen. Great work!
• Emmanuel Conde has written a fantastic article on job search considerations when you are a CCIE. Emmanuel is a CCIE recruitment guru who specializes in locating CCIEs and Senior Network Professionals for Cisco Systems and their international Partners. Next time I'm in the job market I know where I'll be going for help! Awesome work Emmanuel.
• If you are heading out to Cisco Networkers in Orlando be sure to check out IPexpert's 2008 Networkers Party on Monday night (June 23rd). They are giving away $100,000+ in prizes including: 8 CCIE “End-to-End” All-Inclusive Training Programs ($10K+ value each!), 10 of IPexpert’s NEWLY-RELEASED Blended Learning Solutions ($1600+ value each!) and 5 CCIE 5-Day Boot Camp seats ($5000+ value each!). The first 50 people in the door are guaranteed prizes! Man, I wish I could go! Think of me back in Australia when you are getting your drink and your wing on! :) RSVP / Register Here
• Robert Williams from CertGuard has issued a formal public apology to Ethan and the CCIE community. I'm glad we can now put an end to this soap opera and the rest of us can get back to studying and writing articles for the CCIE community.
• Ethan's back... Great response from the CCIE Community. I posted my take on the whole fiasco here, and I am glad if it helped in any way. In the end common sense and justice prevailed. The reputation of both NetworkWorld and CertGuard has been severely tarnished by this, and I hope CertGuard and Robert Williams are forthcoming with a proper apology. Welcome back Ethan!
• I was trolling through the Cisco website and I found this awesome list of Freqently asked questions created by Cisco in its IP Routing Technology Q&A webpage. Check them out, they are definitely recommended reading for a CCIE candidate: IP Routing: Frequently Asked Questions, BGP: Frequently Asked Questions, OSPF: Frequently Asked Questions, EIGRP: Frequently Asked Questions, ODR: Frequently Asked Questions.
• Looks like IPexpert is on twitter! They've got a promotion on there with $2500 off security and voice bootcamps! Awesome! Follow them here: http://twitter.com/ipexpert  
• Greg Ferro from My EtherealMind has a great article on IOS Reverse SSH console access. We use reverse telnet access here for all our lab equipment access and I always wondered (but never had time to investigate) whether we could do reverse ssh. Looks like I've just given myself more work to do. Thanks etherealmind! :)

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